Mitsubishi Electric MELSEC-A/QnA Series Handbook page 285

7
POSITIONING MODULE REPLACEMENT
LED name
RUN
Minor error
Major error
Encoder phase A
Encoder phase B
Encoder phase Z
BUSY
Zero adjustment status
Gain adjustment status
Servo READY
Near-zero point dog
Stop
Upper limit LS
Lower limit LS
In-Position
Error counter polarity
Error counter value
PC READY
Zero-return request
Excessive error
WDT error
During velocity operation
*3 The I/O signals shown in the table are the ones when the QD73A1 is mounted on the slots "0, 1" of a main base unit.
Note that XY addresses of the QD73A1 are different from the ones of the AD70 because the number of occupied slots
differs between the modules as shown below.
AD70 QD73A1
-- RUN
ERR.1
ERR. Used for both minor errors and major errors.
ERR.2
A A
B B
Z Z
BUSY BUSY
The contents indicated with "ZERO" of the QD73A1 differ from the ones
-- ZERO
indicated with "ZERO" of the AD70.
-- GAIN
SV RDY -- Can be checked with an input signal "X1B".
DOG -- Can be checked with an input signal "X1C".
STOP -- Can be checked with an input signal "X1D".
FLS -- Can be checked with an input signal "X1E".
RLS -- Can be checked with an input signal "X1F".
IN-POS -- Can be checked with an input signal "X16".
POLE -- Can be checked with buffer memory addresses "106, 107".
The LED "POLE" of the AD70 indicates ON when the deviation counter
n
--
2
value is "-", and indicates OFF when the deviation counter value is "+".
PC RDY -- Check the on/off status of an output signal "Y2D" with a device monitor.
Can be checked with an input signal "X12".
ZERO -- The contents indicated with "ZERO" of the AD70 differ from the ones
indicated with "ZERO" of the QD73A1.
EEX -- Can be checked with an input signal "X17".
WDT ERR -- Can be checked with an input signal "X10".
V-MODE -- Can be checked with an input signal "X2D".
AD70
*3
Remarks
QD73A1
QD73A1
7
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